TEM Asbestos air sample results, NYC BOE, Apr 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1840 Lab Group #: 7521 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: Grid Opening Size: 0.01124

Client Sample #: 07 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRID ID: / Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/24/02

Analysis Performed By: ROMAN PEYSAKHOV

GO, Structure Structure Type Length ID of Structure N or v EDS ' 'Nonadb ■ No F B C M >=05 M Chrys Amphibole Nonasb Ambig/ND No Coord <5|J Elements) i

(T / 6

3!^ ■..._

Struct := > 0.5n > 5; I .Aspect Ratio Grid acceptance: \'= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% j B I C . M ; >5u v= EDS spectrum conforming to laboratory holes or opaque areas _____________ Identification criteria observed Chrysotile i ■AMPHIBOLES Amphibole I r = Single Fiber Amosite 3 = Bundle <3 fibers <1 fiber diameter apart Crocidolite Ambiguous i C = Cluster ;>3 intersections! Anthophyllite Non-Asbestos Tremolite M = Matrix j Non-Identified Actinolite \SD = No Structures Detectea

CONFIDENTIAL, CITY_21MC100_0 03471262 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000177061